Answer:
apparatus
a fire truck or fire engine
division chief
overseers of shifts as well as specialty units, such as training, safety, emergency medical services, and special operations
battalion chief
the person in charge of a station when firefighters are on duty (per shift) and who reports to the division chief
call company
organization of personnel to man specific apparatuses and enhance the abilities of the unit as needed
chief officer
any officer who holds the rank of battalion chief or higher
deputy fire chief
second to the fire chief; may be in charge of specific duties such as training or operations
district
a geographical region of the city or town that has specific apparatus response plans
emergency medical technician
a fire department member who is specifically licensed within their state for the responsibilities of patient assessment and treatment